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Cursors: optional snapping

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This commit is contained in:
Erik Bročko
2026-03-25 21:53:36 +01:00
parent 608ff9ed85
commit 1918645d53
3 changed files with 15 additions and 12 deletions
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20
src/ui/Application.cpp
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@@ -1112,17 +1112,17 @@ void Application::handleSpectrumInput(float posX, float posY,
cursors_.hover = {true, freq, dB, bin};
}
// Left click: cursor A
if (ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
int peakBin = cursors_.findLocalPeak(spec, bin, 10);
double peakFreq = analyzer_.binToFreq(peakBin);
cursors_.setCursorA(peakFreq, spec[peakBin], peakBin);
// Left drag: cursor A
if (ImGui::IsMouseDown(ImGuiMouseButton_Left)) {
int cBin = cursors_.snapToPeaks ? cursors_.findLocalPeak(spec, bin, 10) : bin;
double cFreq = analyzer_.binToFreq(cBin);
cursors_.setCursorA(cFreq, spec[cBin], cBin);
}
// Right click: cursor B
if (ImGui::IsMouseClicked(ImGuiMouseButton_Right)) {
int peakBin = cursors_.findLocalPeak(spec, bin, 10);
double peakFreq = analyzer_.binToFreq(peakBin);
cursors_.setCursorB(peakFreq, spec[peakBin], peakBin);
// Right drag: cursor B
if (ImGui::IsMouseDown(ImGuiMouseButton_Right)) {
int cBin = cursors_.snapToPeaks ? cursors_.findLocalPeak(spec, bin, 10) : bin;
double cFreq = analyzer_.binToFreq(cBin);
cursors_.setCursorB(cFreq, spec[cBin], cBin);
}
{

6
src/ui/Cursors.cpp
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@@ -83,7 +83,7 @@ void Cursors::draw(const SpectrumDisplay& specDisplay,
float aDB = avgDBA(), bDB = avgDBB();
drawCursorMarker(cursorA, aDB, IM_COL32(255, 255, 0, 220));
drawCursorMarker(cursorB, bDB, IM_COL32(0, 200, 255, 220));
drawCursorMarker(cursorB, bDB, IM_COL32(100, 220, 255, 220));
// Draw labels at the top, touching the cursor's vertical line.
// If the label would overflow the right edge, flip it to the left side.
@@ -113,7 +113,7 @@ void Cursors::draw(const SpectrumDisplay& specDisplay,
};
drawCursorLabel(cursorA, aDB, IM_COL32(255, 255, 0, 220), "A", 0);
drawCursorLabel(cursorB, bDB, IM_COL32(0, 200, 255, 220), "B", cursorA.active ? 1 : 0);
drawCursorLabel(cursorB, bDB, IM_COL32(100, 220, 255, 220), "B", cursorA.active ? 1 : 0);
// Delta display (two lines, column-aligned on '=')
if (showDelta && cursorA.active && cursorB.active) {
@@ -156,6 +156,8 @@ void Cursors::drawPanel() {
ImGui::Text("%s", dbuf);
}
ImGui::Checkbox("Snap to peaks", &snapToPeaks);
// Averaging slider (logarithmic scale)
ImGui::SetNextItemWidth(-1);
ImGui::SliderInt("##avgcount", &avgCount, 1, 20000, avgCount == 1 ? "No avg" : "Avg: %d",

1
src/ui/Cursors.h
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@@ -45,6 +45,7 @@ public:
CursorInfo cursorA;
CursorInfo cursorB;
bool showDelta = true;
bool snapToPeaks = true;
// Hover cursor (follows mouse, always active)
CursorInfo hover;